X9251_07 Datasheet, PDF (11/20 Pages) Intersil Corporation – Quad Digitally-Controlled (XDCP™) Potentiometer

X9251
Global Transfer Wiper Counter Register (WCR) to Data Register (DR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
Instruction
Opcode
DR
Addresses
0 0 A1 A0 1 0 0 0 RB RA 0 0
CS
Rising
Edge
HIGH-VOLTAGE
WRITE CYCLE
Transfer Wiper Counter Register (WCR) to Data Register (DR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
0 0 A1 A0
Instruction
Opcode
1110
DR and WCR
Addresses
RB RA 0 0
CS
Rising
Edge
HIGH-VOLTAGE
WRITE CYCLE
Transfer Data Register (DR) to Wiper Counter Register (WCR)
CS
Falling
Edge
Device Type
Identifier
0101
Device
Addresses
0 0 A1 A0
Instruction
Opcode
1101
DR and WCR
Addresses
RB RA 0 0
CS
Rising
Edge
Increment/Decrement Wiper Counter Register (WCR)
CS
Falling
Device Type
Identifier
Device
Addresses
Instruction
Opcode
WCR
Addresses
Increment/Decrement
(Sent by Master on SI)
CS
Rising
Edge _{0 1 0 1 0 0 A1 A0 0 0 1 0 X X 0 0 I/D I/D . . . . I/D I/D} Edge
Read Status Register (SR)
CS
Falling
Device Type
Identifier
Device
Addresses
Instruction
Opcode
WCR
Addresses
Data Byte
(Sent by X9251 on SO)
Edge _{0 1 0 1 0 0 A1 A0 0 1 0 1 0 0 0 1 0 0 0 0 0 0 0 WIP}
NOTES:
1. “A1 ~ A0”: stands for the device addresses sent by the master.
2. WPx refers to wiper position data in the Counter Register
3. “I”: stands for the increment operation, SI held HIGH during active SCK phase (high).
4. “D”: stands for the decrement operation, SI held LOW during active SCK phase (high).
CS
Rising
Edge
11
FN8166.5
April 13, 2007